Colour:gray Material:plastic Compatible with model: for 500 600 700 Series all ( 527 510 520 530 535 550 551 529 601 602 527e 595 620 630 650 660 655 760 770 780 790 ) Vacuum Cleaning Robots Note:This frame could use on 500 Series 527 510 520 530 535 550 551 529 because the two kinds main brushes has the some size. Package Contents: 1x Main brush Module 2x Main brush Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.